<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <svg width="300" height="300" viewBox="0 0 100 100">
        <path d="M50,10 a40,40 0 0 1 0,80 a40,40 0 0 1 0,-80" 
              stroke="black" stroke-width="10" stroke-dasharray="251.2"
              style="stroke-dashoffset: 251.2;
                     animation: draw 2s linear forwards;">
          <animate attributeName="stroke-dashoffset" from="251.2" to="0" dur="2s" />
        </path>
      </svg>
      
      <style>
        @keyframes draw {
          to {
            stroke-dashoffset: 0;
          }
        }
      </style>
</body>
</html>